face mask рот pad 5-е изд слоя активированные рм2,5 активировать угольный фильтр сменная маска углерода одноразовая маска pad

face mouth mask pad 5-layer ed activated carbon disposable mask pad features: 1.the first layer: high efficient filter cloth filter the dust of micron. 2.the second layer: meltblown cloth to filter industrial pollutants, automobile exhaust, second-hand smoke pollen allergies. 3.the third layer: high efficient filter cloth filter benzene and a smaller function of filtering dust microns. 4.the fourth layer: activated carbon cloth filter density, sma.